Ontology:
Shock
(C0036974)

Definition (MSH)

A pathological condition manifested by failure to perfuse or oxygenate vital organs.

Definition (MEDLINEPLUS)

Shock happens when your blood pressure is too low and not enough blood and oxygen can get to your organs and tissues. Causes of shock include internal or external bleeding, dehydration, burns, or severe vomiting and/or diarrhea. All of these involve the loss of large amounts of body fluids. Shock often accompanies injury.

Specific types of shock include

Hypovolemic shock, caused by internal or external bleeding

Septic shock, caused by infections in the bloodstream

Anaphylactic shock, caused by a severe allergic reaction

Cardiogenic shock, caused by the inability of the heart to pump blood effectively

Neurogenic shock, caused by damage to the nervous system

Symptoms of shock include cold and sweaty skin, weak but rapid pulse, irregular breathing, dry mouth, dilated pupils and reduced urine flow. Shock is life threatening and it is important to get help right away. Treatment of shock depends on the cause.

National Institute of General Medical Sciences

Definition (NCI)

A life-threatening condition that requires immediate medical intervention. It is characterized by reduced blood flow that may result in damage of multiple organs. Types of shock include cardiogenic, hemorrhagic, septic, anaphylactic, and traumatic shock.

Definition (CSP)

a profound hemodynamic and metabolic disturbance characterized by the failure of the circulatory system to maintain adequate perfusion of vital organs; causes inadequate delivery of nutrients and insufficient removal of cellular waste products to and from the tissues.

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This page was written by Scott Moses, MD, last revised on 9/3/2017 and last published on 3/3/2018.